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What creates a Na concentration gradient in the proximal tubule?
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What is the last tubule in the nephron?
Proximal tubule
What are occurs in the proximal tubule?
The regulation of pH of the filtrate is what occurs in the proximal tubule. The regulation occurs by exchanging hydrogen ions for bicarbonate ions. The proximal tubule is part of the duct system of the kidney.
What are the similarities between the distal tubule and the proximal tubule?
- proximal tubule : • Selective reabsorption of nutrients from filtrate back into blood by active and passive transport. • Within proximal tubule, pH is controlled by secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32). - distal tubule • Selective reabsorption of nutrients from blood into nephron by active transport. Distal tubule helps regulate potassium (K1) and salt (NaCl) concentration of body fluids. • As in proximal tubule, pH is controlled by tubular secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32).
Which structure is the first section of the nephron tubule into which the filtrate enters?
the proximal tubule
Is creatinine reabsorbed by the proximal convoluted tubule?
no
How are NaCl and water reabsorbed in proximal tubule?
Mitochondria are needed in order to supply the energy for the active transport of sodium ions out of the cells in the proximal tubule to create a concentration gradient which allows more sodium ions to enter the cell from the luminal side.Water passively follows the sodium out of the cell along its concentration gradient.
What is tertiary active transport?
Tertiaryuses secondary which in its turn uses primary:-Primary uses ATP and so creates anelectrochemicalgradient. -Secondary uses this gradient and so creates a concentration gradient.-Tertiary uses this concentration gradient.Example: Proximal Straight Tubule in NephronsPrimary: Basolateral NaK-pumpSecondary: Na/H antiporter.Tertiary: Cl/base exchange.
Where does reabsorption primarily occur in the urinary system?
Proximal tubule
What is the last portion of the renal tubule?
the three main portions of the renal tubule are the proximal convoluted tubule, the loop of henle, and the distal convoluted tubule. the proximal convoluted tubule is the first portion. The proximal (convulated) tubule.
The portion of the nephron closest to the renal corpuscle is the?
Proximal tubule
What is the last tubule in the nephron?
Proximal tubule
What is the primary site of tubular reabsorption in the kidneys?
The distal convoluted tubule or the collecting tube.
What are occurs in the proximal tubule?
The regulation of pH of the filtrate is what occurs in the proximal tubule. The regulation occurs by exchanging hydrogen ions for bicarbonate ions. The proximal tubule is part of the duct system of the kidney.
What are the similarities between the distal tubule and the proximal tubule?
- proximal tubule : • Selective reabsorption of nutrients from filtrate back into blood by active and passive transport. • Within proximal tubule, pH is controlled by secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32). - distal tubule • Selective reabsorption of nutrients from blood into nephron by active transport. Distal tubule helps regulate potassium (K1) and salt (NaCl) concentration of body fluids. • As in proximal tubule, pH is controlled by tubular secretion of hydrogen ions (H1) and reabsorption of bicarbonate ions (HCO32).
What are the subdivisons of the renal tubule?
Proximal convoluted tubule, Loop of henle and Distal convoluted tubule.
What organ has a proximal tubule?
kidney
Which structure is the first section of the nephron tubule into which the filtrate enters?
the proximal tubule
